Effects of vitamin E deficiency and glutathione depletion on stress protein heme oxygenase 1 mRNA expression in rat liver and kidney.
Heme oxygenase 1 (HO-1) is a stress protein and has been suggested to provide defense mechanisms against agents that may induce oxidative injury. Vitamin E (VE) is considered to function as an important cellular antioxidant. Rats were fed a VE-deficient (0E) or a VE-sufficient (10E) diet for 6 weeks and then were intraperitoneally administered buthionine sulfoximine (BSO), a glutathione (GSH)-depleting reagent. Whereas HO-1 mRNA levels were undetectable in untreated 0E and 10E rat livers, BSO administration induced HO-1 mRNA expression in both 0E and 10E rat livers. High levels of HO-1 mRNA expression were observed in particular in BSO-treated 0E rat livers. The time-course of changes in HO-1 mRNA expression in 0E rat liver after BSO administration showed that HO-1 mRNA expression was transiently induced at 2.5 hr after BSO treatment, the earliest time examined. In addition, to determine whether VE deficiency and GSH depletion affect the expression of HO-1 mRNA in other tissues, we also examined the time-course of HO-1 mRNA expression in BSO-treated 0E rat kidney. The expression pattern of HO-1 mRNA in the kidney was very similar to that in the liver, and the peak was also observed at about 2.5 hr after BSO administration. Interestingly, histologic assessment of liver and kidney showed that VE deficiency and GSH depletion induced injury in the kidney, but not in the liver.
Ito
K
K
Department of Surgery, Tsuchiura Kyodo Hospital, Japan.
Yano
T
T
Hagiwara
K
K
Ozasa
H
H
Horikawa
S
S
D000818:Animals; D019328:Buthionine Sulfoximine / Q000494:pharmacology; D005978:Glutathione / Q000502:physiology*; D006360:Heat-Shock Proteins / Q000235:genetics*; D006419:Heme Oxygenase (Decyclizing) / Q000235:genetics*; D007668:Kidney / Q000201:enzymology*; D008099:Liver / Q000201:enzymology*; D008297:Male; D012333:RNA, Messenger / Q000032:analysis*; D051381:Rats; D017208:Rats, Wistar; D014811:Vitamin E Deficiency / Q000378:metabolism*
D006360:Heat-Shock Proteins; D012333:RNA, Messenger; D019328:Buthionine Sulfoximine; D006419:Heme Oxygenase (Decyclizing); D005978:Glutathione